Antunes FGA-H010 Installation Manual
A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
2 11/16"
(68 mm)
3"
(76 mm)
1 3/8"
(35 mm)
1 11/16"
(43 mm)
13/16"
(21 mm)
1 5/32"
(30 mm)
Reset Buttom
(Manual Only)
1/2" Conduit
Knockout
1 11/16"
(43 mm)
1 5/32"
(30 mm)
1/2" Conduit
Knockout
Versa Plus Gas Pressure Switches Installation Information
IMPORTANT
Please read these instructions carefully to assure
correct installation. This equipment must be
installed only by a licensed electrician who is
experienced with combustion safeguard control
systems and understands the functions of interlocking switches, such as gas pressure switches.
Prior to being put into operation in conjunction
with the combustion safeguard systems, all
switches should be tested for proper range setting
and proper wiring. Check piping connections and
switch house for leaks with a soap bubble test. All
exhaust fans and blowers should be inspected and
checked for proper rotation prior to starting up.
Versa Plus Gas Pressure Switches
Antunes Controls new line of gas pressure switches monitors gas pressure and breaks the electrical control circuit
when pressure drops below or rises above the desired
setpoint. The gas pressure settings are adjustable and
available in manual or automatic reset operation.
These switches are sturdy and constructed with a durable plastic electrical enclosure and a die-cast aluminum
inlet base.
Specifications
Electrical Ratings: 6A @ 120 VAC, 6A @ 240 VAC, 1/8
HP 120 & 240 VAC
Adjustable Operating Pressure: 1.2 to 275 mbar
0.5” W.C. to 4 PSI (different ranges)
NOTE: To avoid initial line fill pressure spikes, unit should
be placed downstream of the regulator.
Max. Surge Pressure: 7 PSI (482 mbar)
Ambient Operating Temperature: 5°F to 180°F
(-15°C to 82°C)
Field wiring to be rated @ 90°C (194°F) for maximum
ambient
Shipping Weight: 0.5 lbs. (.227 kg)
Options:
4-Pin DIN Connector
Neon Lamp Indicator
Side Mounting
Dimensions
Gas (Air) Inlet 1/4" NPT
3"
2 11/16"
(76 mm)
(68 mm)
3"
(76 mm)
1 5/32"
(30 mm)
1/2" Conduit
Knockout
1 11/16"
(43 mm)
Note: Dimensions are
for reference only.
Ranges Available
Low Ranges
Model Part No. W.C. mbar
Automatic Reset
FGA-L010 8261001010 0.5”–4” 1.2–10
FGA-L050 8261002050 1”–20” 2.5–50
FGA-L110 8261003110 4.8”–44” 12–110
FGA-L275 8261004275 28”–110” 70–275
Manual Reset
FGM-L 010 8271001010 0.5”–4” 1.2–10
FGM-L 050 8271002050 1”–20” 2.5–50
FGM-L 075 8271003075 5.2”–30” 13-75
FGM-L 136 8271004136 6.8”–54.5” 17-136
High Ranges
Model Part No. W.C. mbar
Automatic Reset
FGA-H010 8261005010 0.8”–4” 2–10
FGA-H050 8261006050 2”–20” 5–50
FGA-H087 8261007087 5”–35” 13–87
FGA-H275 8261008275 28”–110” 70–275
Manual Reset
FGM-H 050 8271005050 2”–20” 5–50
FGM-H 087 8271006087 8”–35” 20–87
FGM-H 150 8271007150 10”–60” 25–150
(76 mm)
1 3/8"
(35 mm)
3"
Reset Buttom
(Manual Only)
13/16"
(21 mm)
1-630-784-1000 Fax: 630-784-1651 Page 1 of 4 P/N 1011063 Rev. A 06/10
1-800-253-2991
A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
Versa Plus Gas Pressure Switches Installation Information
Mounting
All switches can be mounted in either horizontal or vertical position. Switches should be reasonably level but do
not require accurate leveling.
Single gas switch models have a 1/4” NPT (female) gas
inlet on the standard base.
Piping can either be standard black pipe or aluminum tubing.
All switches can be support by the inlet pipe, but optional
mounting brackets and bases are available (see Figures
1 through 5).
Switches have been factory calibrated and tested for
leaks. However, it is recommended that switch, gas pipe
inlets, and connections be soap bubble tested for leaks
after installation.
STANDARD SWITCH BASE
PANEL MOUNTING
SUGGESTIONS
OPTIONAL SWITCH BASE SIDE
MOUNTING SUGGESTIONS
WITH “O” RING
Figure 1
STANDARD SWITCH BASE
REMOTE MOUNTING
SUGGESTIONS
OPTIONAL SWITCH BASE
BOTTOM MOUNTING
SUGGESTIONS WITH
“O” RING
Figure 2
Operation
LOW GAS PRESSURE MODELS
Low gas pressure switches break the electrical circuit on
pressure drop at the point when gas pressure becomes
lower than the indicated set pressure.
In order to reset the switch, the gas pressure in the
chamber must be higher than the indicated setting. For
manual reset switches, the reset button must also then be
pressed.
HIGH GAS PRESSURE MODELS
High gas pressure switches break the electrical circuit
when pressure rises above the indicated preset pressure.
In order to reset the switch, the gas pressure in the
chamber must be lower than the indicated setting. For
manual reset switches, the reset button must also then be
pressed.
RANGE ADJUSTMENT (ALL MODELS)
To adjust gas pressure cutoff setting, remove the cover.
Turn the range scale adjustable knob (Figure 6) clockwise to increase pressure setting, counterclockwise to
decrease pressure setting. Install cover and tighten the
two cover screws to prevent tampering.
RANGE SCALE
(ADJUSTABLE KNOB)
RESET BUTTON
OPTIONAL SWITCH BASE
SIDE-BY-SIDE MOUNTING
SUGGESTIONS HIGH AND
LOW GAS PRESSURE
Figure 5
Figure 3
Figure 4
Figure 6
Manual ResetAutomatic Reset
1-630-784-1000 Fax: 630-784-1651 Page 2 of 4 P/N 1011063 Rev. A 06/10
1-800-253-2991
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